Nici's first job was for Astral Blue where she did a solo girl movie. After appearing as a "Readers Wife" in British top shelf magazines, Sterling began her professional career modelling in England where she worked as a topless and nude model, mainly appearing in the Daily Sport newspaper. It was while working as a model for the Daily Sport that Sterling made her debut in the world of hardcore pornography, when the Daily Sport famously ran a competition for their readers, in which 10 readers could win the chance to be involved in a sex orgy with Sterling, which was to be filmed and then sold as a hardcore porn film. After this debut, she moved to the United States in the mid-1990s to work in the hardcore porn industry. Sterling has appeared in many videos. She is sometimes credited as Nici Norman.
In 1996 Nici Sterling won an AVN award crediting her with being the best looking starlet in the industry. She has not done any recent work, and has been concentrating on spending time with her family. She is married to Wylde Oscar and have one daughter, Alexandra, born in 1993. In 2007, she was inducted into the AVN Hall of Fame.
Sterling considers herself to be bisexual, stating when she was a teenage she was in a relationship with another woman.